/Engine/Source/Runtime/Engine/Public/AudioStreamingCache.h
This implementation of the audio streaming manager uses an internal LRU cache (or in more advanced applications, a bank of parallel LRU caches)
struct FCachedAudioStreamingManager : public [IAudioStreamingManager](API\Runtime\Engine\IAudioStreamingManager)
TArray<FAudioC...
CacheArray
Audio chunk caches. These are set up on initialization.